Publication Date:
2015-08-08
Description:
This work focussed on the mathematical modeling of the separation process in counter-current decanter centrifuges, taking the influence of the sediment build-up and the flow pattern into account. Thus far, separation processes in centrifuges are calculated by means of simplified empirical models based on the so-called sigma-theory. To reduce experimental effort, we have developed a new model, which describes the separation process by considering material functions for sedimentation and the gel point. In addition to that, an arising sediment build-up and a change in the flow conditions are taken into account. The conducted numerical simulations are validated by experiments. Simplified models such as the sigma theory usually depend on experimental data of industrial machines. Our approach shows an enhanced accuracy while not depending on such information. The proposed simulation procedure is adaptable to other types of decanter centrifuges such as co-current machines.
Print ISSN:
0930-7516
Electronic ISSN:
1521-4125
Topics:
Chemistry and Pharmacology
,
Process Engineering, Biotechnology, Nutrition Technology
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